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AC-20 AC-20 as FedRAMP applies it

FedRAMP Consolidated Rules (2026) 2026.10.13.01 against 2026.10.08.01
All changes in this version
unchanged CTL-AC: FedRAMP parameters and guidance, AC

Title

AC-20 as FedRAMP applies it

Discussion

The interrelated controls of AC-20, CA-3, and SA-9 should be differentiated as follows:
AC-20 describes system access to and from external systems.
CA-3 describes documentation of an agreement between the respective system owners when data is exchanged between the CSO and an external system.
SA-9 describes the responsibilities of external system owners. These responsibilities would typically be captured in the agreement required by CA-3.